Restoration of T. sesselensis Triodus is an extinct genus of xenacanthiform cartilaginous fish that lived from the Carboniferous to the Permian . In 2017, a new species Triodus richterae was described from the Rio do Rasto Formation of Brazil .[ 1]
References ^ Victor E. Pauliv; Agustín G. Martinelli; Heitor Francischini; Paula Dentzien-Dias; Marina B. Soares; Cesar L. Schultz; Ana M. Ribeiro (2017). "The first Western Gondwanan species of Triodus Jordan 1849: A new Xenacanthiformes (Chondrichthyes) from the late Paleozoic of Southern Brazil". Journal of South American Earth Sciences . 80 : 482– 493. Bibcode :2017JSAES..80..482P . doi :10.1016/j.jsames.2017.09.007 .
Further reading The Rise of Fishes: 500 Million Years of Evolution by John A. Long
† Sinacanthidae Hunanacanthus Neosinacanthus Sinacanthus Tarimacanthus † "Ischnacanthiformes "
Acanthospina Campylodus Granulacanthus Machaeracanthus ? Onchus Serradentus Acritolepidae Ischnacanthidae Arcticacanthus Arenaceacanthus Atopacanthus Bracteatacanthus Cacheacanthus Erymnacanthus Euryacanthus Gomphonchus Grenfellacanthus Ischnacanthus Marsdenius ? Persacanthus Plectrodus Rockycampacanthus Rohonilepis Taemasacanthus Tricuspicanthus Xylacanthus Podoliacanthidae Poracanthodidae Gomphonchoporus Machaeraporus Obruchevacanthus ? Poracanthodes Radioporacanthodes Taimyrolepis Trundlelepis Zemlyacanthus
† Diplacanthiformes
† Acanthodiformes
† "Climatiiformes " and related taxa
† Incertae sedis "Conventionally defined chondrichthyans"
"Conventionally defined chondrichthyans"
† Altholepidiformes?† Elegestolepidida?
† Listracanthidae † Mongolepidida
Mongolepididae Mongolepis Rongolepis Sodolepis Taklamakanolepis Teslepis Shiqianolepidae Chenolepis Shiqianolepis Tielikewatielepis Xiaohaizilepis Xinjiangichthys
† Tchunacanthidae Fecundosquama Lenacanthus Tchunacanthus † Vesperaliidae Acanthacanthus Vesperalia † Others Altacollum Canyonlepis ? Frigorilepis ? Funicristata Gualepis Ivanelepis Jolepis Karksilepis Lunalepis Modicucollum Nobilesquama Nostolepis Nostovicina Ohiolepis Seretolepis Serpensiugum Tuvalepis Verrucasquama Wellingtonella ? Yuanolepis